Table 7.

The keywords of cluster 1

Cluster	Label	Total link strength	Occurrences	Avg. citations
1, red and yellow	Service	199	50	62.98
	Product	178	56	64.03
	Customer	143	35	62.37
	Business model	112	28	48.17
	Provider	92	23	35.56
	Servitization	77	18	28.72
	Value creation	65	16	30.37
	Actor	61	15	24.26
	Ecosystem	55	14	27.21
	Digital servitization	45	10	30.2
	Response	45	9	17.66
	Value proposition	40	10	18.1
	Dynamic	38	10	23.9
	Boundary	36	10	22.1
	Intelligent service	35	8	29.25
	Competitiveness	34	11	8
	Business model innovation	32	6	49.33
	Germany	23	8	36.25
	Stakeholder	23	5	5
	New business model	21	7	127.2
	Digital innovation	20	7	14.85